This word consists of kanji with hiragana attached. Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means have and so the verb version means to have. An alternative meaning is to exist though this refers only to non-living inanimate things, not moving and living things. So really, this is similar to "to have" as well.

The kanji isn't used too often for this word, so when you're writing just use the kana. But you'll see the kanji used sometimes so it's important to be able to recognize it!